Bug 431729 - ntpd -x doesn't disable kernel discipline
Summary: ntpd -x doesn't disable kernel discipline
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: ntp   
(Show other bugs)
Version: 5.2
Hardware: All
OS: Linux
Target Milestone: rc
: ---
Assignee: Miroslav Lichvar
QA Contact: Brian Brock
Depends On: 431728
TreeView+ depends on / blocked
Reported: 2008-02-06 18:04 UTC by Miroslav Lichvar
Modified: 2018-11-30 20:03 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2009-01-20 21:16:33 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2009:0125 normal SHIPPED_LIVE ntp bug fix update 2009-01-20 16:04:53 UTC
Red Hat Knowledge Base (Solution) 68712 None None None Never

Description Miroslav Lichvar 2008-02-06 18:04:33 UTC
+++ This bug was initially created as a clone of Bug #431728 +++

Description of problem:
ntpd doesn't disable kernel discipline when -x option is used or step threshold
is set to a larger value.

miscopt.html from ntp documentation has:
       step step
            The argument is the step threshold, which by default
            is 0.128 s. It can be set to any positive number in
            seconds. If set to zero, step adjustments will never
            occur. Note: The kernel time discipline is disabled
            if the step threshold is set to zero or greater than
            the default.

This is related to bug #154625 which was fixed by suspending kernel discipline
when offset was larger than 0.5s, but disabling kernel discipline completely is
the correct fix (https://support.ntp.org/bugs/show_bug.cgi?id=628).

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. ntpd -x
2. wait until ntpd is synced
2. ntptime | grep status
Actual results:
status 0x1 (PLL)

Expected results:
status 0x40 (UNSYNC)

Additional info:

Comment 1 RHEL Product and Program Management 2008-06-02 20:19:19 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update

Comment 6 errata-xmlrpc 2009-01-20 21:16:33 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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